Wellhole cleaning device



Feb. 13; 1940.

C. E. BRADEN VWELLHOLE CLEANING DEVICE 2 Sheets-Sheet 1 Filed May 27, 1959 M 3 M11 a w 5 2 Ma a We Z m 7 Q4 Feb. 13, 1940. c, E. BRADEN WELLHOLE CLE ANING DEVI CE Filed May 2'7, 1939 2 Sheets-Sheet 2 Patente res. 13, 1. ,1-

UNITED STATES PATENT OFFICE 5 Claims.

This invention relates to a wellhole cleanin device and has for its object to provide a tool for, insertion in wellholes having an expansible brush adapted to be expanded into engagement I with the walls of the holeswhen the tool contacts with the bottom of the hole whereby the walls are cleaned upon reciprocation of the tool.

A further object of the invention resides in adjustably mounting the tufts of bristles in the m brush head to permit extension of the bristles as they become worn down and renewal of the bristles' when necessary.

Another object of the invention resides in providing a device of the above-mentioned character which is simple and durable in construction,

reliable and eflicient in operation, and inexpensive to manufacture.

Other objects and advantages of the invention will be apparent during the course of the foll lowing description.

- In the accompanying drawings forming a part or this specification and in which like numerals are employed to designate like parts throughout the same, W

ill Fig. 1 is a side elevation of the device,

Fig. 2 is a longitudinal sectional view of the device,

Fig. 3 is an enlarged section through one of the. socket members for holding the bristles, 30 Fig. 4 is a detail view of the cylinder part of the socket member,

-Fi8. 5 is a detail view of the nut applied to the cylinder as shown in Fig. 4,

Fig. 6 is an end view of the socket member 38 assembled with a tuft of bristles therein, and

Fig. 7 is a side elevation of the tuft of bristles.

In the drawings, wherein for the purpose of illustration I have shown a preferred embodiment of 'my invention, the numeral 5 denotes a barrel 40 threadedly connected at one end to a solid head 6 having the usual threaded pin I adapted to fit a standard jar. The bore of the barrel at its other end .is reduced in diameter; as at 8, forming a shoulder 9 inside of the barrel, and

45 openings Ill are provided in opposite sides of the barrel adjacent the shoulder for receiving the heads ll of the spring dogs 12 seated in recesses in the outer wall of the barrel, the dogs-being secured at one end by screws 13 which permit 50 theheads II to move laterally in and out of the openings. A plunger I4 is slidably mounted in the reduced bore of the barrel having a circular head l5 formed integral with its inner end, the periphery of the head being beveled,'as at l6, for engagement in the notches l'l formed in the heads ll of the spring dogs, when the plunger is moved inwardly. The head I5 is adapted to contact the shoulder 9 to limit the outward movement of the plunger. and inward movement of the plunger is limited by a stop bolt l8 disposed 6 centrally in the barrel and 'adjustably secured in the head 6 by a lock nut 19. By adjusting the bolt 18 the extent of movement of the plunger may be controlled. A screw 20 in the side of the barrel intersects the reduced bore and en- 1 gages in a longitudinal groove 2| in the side of the plunger to secure the plunger against rotation. An expansible sleeve or brush head 22 is slidably mounted on the free end of the plunger and is secured thereon by means of .a cap 23 15 threaded on the end of the plunger, the cap being locked in position by a set screw 24. The brush head 22 is preferably constructed of rubber or other suitable material, each end having an inturned flange 25 to form a bearing for the go plunger. The cap 23 is provided with a central recess 26 which is threaded to receive an extension rod, not shown, to limit the downward movement of the device in the well. The barrel 5 is locked to the head 6 by a set screw 21. 25 The ends of the recesses in which the spring dogs l2 are seated have notches at one end to permit a tool to be inserted for raising the spring 7 dogs to release the heads II from engagement with the head of the plunger H, to permit the 30 brush head to be collapsed when inserting the tool in the wellhole.

' other end of the cylinder is exteriorly screwthreaded to receive the hexagonal nut 33 which is provided with a tapered bore. The cylinder is slotted longitudinally at its outer end, as at 34, forming compressible fingers which are bent inwardly when the nut 33 is threaded on the end of the cylinder. The tufts of bristles 28 are bent intermediate their ends, as shown in Fig. 7, t and then inserted throughthe cylinder with the free ends of the bristles extending beyond the 60 outer wall/ of the brush head. When the nut 33 is screwed down on the cylinder the compressible fingers are pressed inwardly into clamping engagement with the jtuft of bristles, securely holding the same in its set position. As the ends of the bristles wear away, the tufts of bristles may be adjusted in the socket members to extend the ends of the bristles. If desired,

the'socket members may be molded in the'wall of the brush head during the course. of manufacture.

In use, the device is lowered into the wellhole and upon contacting the bottom of the well, the plunger H is moved inwardly of the barrel 5, thereby expanding the brush head '22 into errgagement with the wall of the wellhole. As the plunger moves inwardly, the head l5 spreads the spring dogs apart until the head I! engages in the notches II, thus securing the plunger in its compressed position. If further expansion of the brush head is desired, .the bolt l8 may be adjusted to permit fin'ther .movement or the plunger until the head I5 is past the heads of the spring dogs which engage beneath the head oi. the plunger and hold it in its set position. After the brush head is expanded the tool is reciprocated up and down in the wellhole, thus causing the bristles to thoroughly clean the wall of the hole.

It is to be understood that the form of my invention herein shown and described is to be taken as a preferred example 0! the same and that certain changes in the shape, size, and arrang ement of the parts may be made without departing from the spirit of the invention or scope of the subjoined claims.

Having thus described my invention, I claim:

1. A wellhole cleaning device comprising a barrel, a plunger mounted to reciprocate in one end of said barrel, an expansible brush head mounted on the outer end of said plunger, a cap securing said head onsaid plunger adapted to expand said head upon inward movement of said plunger, and spring dogs mounted in said barrel adapted to engage and hold said plunger when moved inwardly.

2. A wellhole cleaning device comprising a barrel, a plunger mounted to reciprocate in one end of said barrel, a cap secured on the outer end of said plunger, an expansible tubular brush head mounted on said plunger between said cap and barrel, means for holding said plunger when pressed inwardly to expand said brush head, and tufts of bristles mounted in said brush head.

3. A wellhole cleaning device comprising a barrel, a plunger mounted to reciprocate in one end of said barrel, a cap secured on the outer end of said plunger, an expansible tubular brushhead mounted on said plunger between said cap and barrel, spring dogs mounted in the side of said barrel, a head formed integral with the inner end of said plunger adapted to be engaged by said dogs when the plunger is moved inwardly to expand said brush head, said dogs having means for securing said head against movement in one direction, and tufts of bristles mounted in the wall of said brush head.

4. A wellhole cleaning device comprising a barrel, a plunger mounted to reciprocate in one end of said barrel having a head at its inner end, a cap secured on the outer end of said plunger, an expansible tubular brush head mounted on said plunger between said cap and barrel, spring dogs mounted in the side of said barrel adapted to engage and hold the head ,of said plunger when the plunger is moved inwardly to expand said brush head, means for limiting the inward movement of said plunger, and tufts of bristles mounted in the wall of said brush head.

5. A wellhole cleaning device comprising a barrel, a plunger mounted to reciprocate in one end of said barrel having a head on its inner end, a

cap secured on the outer end of said plunger, an

expansible tubular brush head mounted on said plunger between said cap and barrel, spring dogs mounted in the sides of said barrel adapted to engage the head of said plunger when the plunger is moved inwardly to expand said brush head, socket members mounted in the wall of said brush head, and tufts of bristles adjustably secured in said socket members.

' CLARK E. BRADEN. I 

